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Finding the Fourth Proportional to 223,683.48, 308,691.72 and 128,208.60

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Solution

The fourth proportional to 223,683.48, 308,691.72 and 128,208.60 is: 176,932.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,683.48 : 308,691.72 = 128,208.60 : x
  2. Step 2: Convert to fraction form
    223,683.48/308,691.72 = 128,208.60/x
  3. Step 3: Cross multiply
    223,683.48x = 308,691.72 × 128,208.60
  4. Step 4: Simplify right side
    223,683.48x = 39,576,933,252.79
  5. Step 5: Solve for x
    x = 39,576,933,252.79/223,683.48
  6. Step 6: Final answer
    x = 176,932.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.